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Rat islet isolation yield and function are donor strain dependent.

M de Groot1, B J de Haan, P P M Keizer

  • 1Department of Surgery, Surgical Research Laboratory, Groningen University Hospital, The Netherlands. M.de.Groot@med.rug.nl

Laboratory Animals
|April 9, 2004
PubMed
Summary
This summary is machine-generated.

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Choosing the right rat strain is crucial for islet isolation. Albino Oxford (AO) rats yield more islets, while Lewis rats offer better immediate function for transplantation studies.

Area of Science:

  • Endocrinology
  • Transplantation Biology
  • Cell Biology

Background:

  • Effective rat islet isolation is critical for successful islet transplantation and in vitro studies.
  • Donor strain variability impacts islet yield, purity, and function.

Purpose of the Study:

  • To compare four common rat strains for islet isolation yield, purity, and function.
  • To identify the optimal rat strain for specific research applications, including transplantation and in vitro culture.

Main Methods:

  • Islet isolation from four rat strains (Albino Oxford, Wistar, Lewis, Sprague Dawley).
  • Assessment of islet yield, purity, and function via secretory responses to glucose and glucose plus IBMX.
  • Evaluation of islet function after short-term (2 days) and long-term (1 week) culture.

Related Experiment Videos

Main Results:

  • Albino Oxford (AO) rats yielded twice as many islets compared to Wistar, Lewis, and Sprague Dawley (SD) rats.
  • Stimulation with glucose plus IBMX significantly increased the stimulation index across all strains.
  • Lewis islets showed the highest glucose-stimulated insulin secretion immediately post-isolation, while SD islets exhibited inferior purity and function.
  • AO islets demonstrated improved function after culture but required IBMX for robust insulin secretion after 2 days.

Conclusions:

  • Rat islet isolation yield and function are donor strain-dependent.
  • Lewis rats are preferred for immediate islet transplantation due to superior glucose responsiveness.
  • AO rats are optimal for culture experiments, reducing animal usage.
  • Using IBMX in functional testing enhances insulin secretion assessment across all rat strains.